Control syringe assembly and attachment



April 21, 1959 E. J. DE VENEZIA coNTRoL STRINGS 'ASSEMBLY AND ATTACHMENT R omME 6. mn m we m au Ml mD.A J j rd. Y B

Edward" b w WM i M n l v T m MM. l .Q Tm mm 5 0 l 41j I a x m 9 2 N W I|L4 Mesnil a Unit States Patent CONTROL SYRINGE ASSEMBLY AND ATTACHMENT Edward J. De Venezia, Bloomfield, NJ., assignor to Becton, Dickinson and Company, Rutherford, NJ., a corporation of New Jersey Application June 6, 1957, Serial No. 664,067 12 Claims. (Cl. 12S-218) This invention relates to an improved hypodermic syringe assembly and an attachment which forms a part of that assembly. In its more specific aspects, the invention contemplates what is commonly known as a control syringe.

By such a syringe, there is provided for the use of the physician or technician an apparatus which may readily be grasped or manipulated even when the user is wearing rubber gloves. So manipulated, it will be feasible to project the plunger to expel liquid or other medicament from the barrel. Also, the plunger may be retracted within the barrel to draw fluid into its interior under an aspirating action. Projection and retraction may both be controlled with nicety so that precisely predetermined amounts of liquid may be moved by the syringe assembly.

It is a primary object to furnish an assembly in which the parts do not have to be separated when subjected to a sterilizing operation. In this matter and aside from the saving in time, breakage is reduced to a minimum.

A further object is that of furnishing an attachment which may readily be associated with the parts of a syringe assembly and which will prevent, in subsequent use, undesired movements of those parts with respect to each other.

With these and other objects in mind, reference is had to the attached sheet of drawings illustrating a practical embodiment of the invention and in which:

Fig. l is a side elevation of a complete syringe assembly;

Fig. 2 is a longitudinally sectional view taken along the line 2 2 in the direction of the arrows as indicated in Fig. l;

Fig. 3 is a fragmentary enlarged sectional side view of the rear portion of the barrel with the attachment affixed thereto;

Fig. 4 is a sectional side view taken along the line 4 4 in the direction of the arrows as indicated in Fig. 3;

Fig. 5 is a transverse sectional View taken along the line 5 5 and in the direction of the arrows as shown in Fig. 3; and

Fig. 6 is a perspective view of the preferred form and coupling means included in the assembly.

Referring primarily to Figs. l and 2, the numeral 10 indicates the barrel of a syringe which is preferably formed of glass and has its outer end closed except for a bored tip 11. The latter ordinarily receives a needle. Therefore a fitting 12 of the Luer type is shown as supported by this tip. The rear end of barrel 10 is open and dened by an outwardly extending ange 13 integral therewith and which flange is non-circular. Preferably and as shown especially in Fig. 5, it may present flattened side portions 14 at diametrically opposite points.

Disposed for sliding movement within the bore of barrel 10 is a plunger 15 which again will preferably be formed of glass. In accordance with conventional structure, the outer end of this plunger is conveniently dened by a knob portion including a bead or lange 16.

'Ihe attachment herein contemplated will yconveniently embrace parts associated with the ends of barrel 10 and fice plunger 15. If the plunger and barrel be constructed in manners such that a series of one may be interchangeably employed with elements of the other, then it is obvious that the techniques involving cleaning and sterilizing of the syringe are substantially simplified.

In other words, under those circumstances, it is unnecessary to match a specific barrel with a given plunger. Therefore, if these parts together with the attachments mounted thereby are cleaned and sterilized and if during these operations one or the other part is broken, no didiculties will be experienced. This will be because any one of a series of plungers removed from the sterilizer will t any one of a series of barrels.

The attachment contemplated for the plunger conveniently embraces a cup-shaped extension 17, to which a thumb-accommodated ring 18 is secured, which preferably has a threaded exterior zone. Cooperating with the threaded part is a retaining ring 19, the inner diameter of which is suliciently large to permit the passage of plunger 15 but is suiciently restricted to prevent bead or flange 16 to pass therethrough. A disc 18 is interposed between the end of the plunger and the extension 17. This disc is preferably of rubber or similar material and serves to cushion the bead zone 16 of the plunger with respect to the parts of the attachment. However, in no manner does it prevent ring 19 from being tightened with respect to the cup-shaped extension so that the plunger is firmly gripped to prevent any movements of the latter with respect to this part of the attachment.

The second portion of the attachment which forms the major part of the present invention also involves an extension. This is in the form of collar 20 continued in cup-shape to provide a threaded flange 21. Mounted upon this thread is a hanged ring 22 which has an inner diameter less than that of flange 13 forming a part of the barrel. However, the flange has a greater diameter than that of the barrel bore.

Collar 20 has in its main portion a diameter suiciently large that the barrel body 10 may be freely passed therethrough. This collar is conveniently formed of steel or other suitable material so that fingers 23, which may be integral therewith and extend axially thereof, shall ernbrace resiliency. Also, they will embody an inward set In other words, they will extend towards the axis of the assembly. Therefore, any barrel received in this extension will be gripped by the latter adjacent the end zones of the annular Iseries of fingers 23 and at its opposite end may be coupled to flange 13vin a manner such that undesired movements are prevented.

To furnish a coupling providing for such a result, it is contemplated to employ a retainer as part of the collar assembly; such retainer preferably involving the detailed construction illustrated in Fig. 6. In that view, it will be noted that the retainer is inthe form of a washer 24 which may embrace a circular body and include upwardly bulged zones 25, which yieldingly resist deformation into the body zone of the spring retaining member. This washer `should be inserted into the cupshaped rear portion of the extension as delined by ange 21 in the manner shown in Figs. 3, 4 and 5. It is to benoted that the inner diameter defined by body 24 is greater than the exterior diameter of barrel 10. It isl less- I coupling member24, will, of course, rest Within the cupshaped space dened by the collar ange. The tip end of the syringe is inserted through the bore of this collar until the inner face of ilange 13 bears against the sprung portions of body 24. The tongue of the latter extends through opening 27 to thus provide a spline and recess structure. The body has its side portions 28 lying one adjacent each of the flattened zones 14 of flange 13. Now by applying ring 22 to ilange 21 and tightening that ring, it is apparent that a space of diminishing area will be furnished for the accommodation of the flange 13.

Under continued tightening, the bulged portions 2S will bear with increasing resistance against the end face of ange 13. The latter will be prevented from turning with respect to blody 24 because extensions 28 lie adjacent the' flattened zones 14. Body 24 may not turn because of tongue 26 preventing this. With linger-accommodatingv rings 29 projecting from opposite sides of collar 20, it is apparent that a complete attachment is furnished.

That attachment will be incapable of rotating around the axis of the syringe assembly. The tightening of ring 22 is, of course, discontinued when the parts firmly interengage as shown, for example, in Figs. 3 and 4. A physician or other technician may, for example, insert his thumb through loop 18 of an attachment such as has heretofore been described in association with the plunger. Obviously, a dierent form of attachment might be used in the latter connection; or under certain circumstances, this attachment might be dispensed with.

In any event, even while wearing a rubber glove, no diculty Will be experienced when inserting the index and middle nger of the hand through the loops 29. So inserted, it is apparent that there will be no danger of the syringe accidentally slipping from the hand. Also, the plunger may be accurately moved with respect to the barrel and the latter may be precisely supported. Therefore, exactly predetermined amounts of fluid may be dispensed with accuracy from the syringe or drawn into its bore under an aspirating action.

As is also apparent, the parts of the attadhment may readily be associated with the parts of the syringe and will remain in association until it is desired to deliberately detach them. This detachment can be readily affected. During washing and sterilizing operations, it will ordinarily be undesirable to thus separate the parts of the assembly.

From the foregoing, it will be understood that among others the several objects of the invention as specically aforenoted are achieved. Obviously, numerous changes in construction and rearrangement of the parts might be resorted to without departing from the spin't of the invention as deued by the claims.

I claim:

1. A hypodermic assembly including in combination a syringe barrel having an open end, a flange extending outwardly from said barrel at such end, a mounting collar encircling said barrel adjacent said end and receiving said ilange, means cooperating with said collar and ange and providing a spline and recess structure to prevent rotational movement of one with respect to the other and a finger-accommodating part mounted by said collar and extending-outwardly therefrom.

2. In a hypodermic assembly as defined in claim l, said ange hav-ing an edge dening a non-circular outline and said cooperating means bearing against said edge.

3. In a hypodermic assembly as dened in claimt 1, said cooperating means including a member within said collar and the spline extending from said member into a recess formed in the collar to prevent rotation of said member with respect to said collar.

4. In a hypodermic assembly as deiined in claim 3, said member including a spring Washer and a 4tongue providing a spline projecting therefrom to engage with a surface of the collar recess.

5. In a hypodermic assembly as defined in claim 2, said flange having substantially flattened portions at diametrically opposite points in its edge and projecting parts included in said cooperating means and bearing against such attened portions.

6. In a hypodermic assembly as dened in claim 1, a plunger slidingly extending into the bore of said barrel, an outer end forming a part of said plunger and a thumbaccommodating portion detachably mounted on said part.

7. An attachment for a syringe including in combination a collar to encircle the barrel of a syringe, means connected to said collar and receiving a flattened flanged portion of said barrel and means cooperating with said collar and to provide a space for the non-rotational association of that barrel ange with said collar.

8. In a syringe attachment a collar presenting a cupshaped recess to receive the ilange of a syringe barrel, retaining means disposed adjacent said recess and movably connected with said collar, means disposed in said recess to engage a non-circular edge of a syringe ange and a iinger engaging part extending outwardly from said collar.

9. ln a hypodermic assembly as deiined in claim 8, said means disposed adjacent said recess comprising a member to -encircle the barrel of a syringe and means for preventing rotation of said member with respect to said collar.

l0. A hypodermic assembly including in combination a syringe barrel having an open end, a ange extending outwardly from said barrel at such end, a mounting collar encircling said barrel adjacent said end and receiving said ange, means cooperating with said collar and ange to prevent rotational movement of one with respect to the other, a finger-accommodating part mounted by said collar and extending outwardly therefrom and lingers extending from said collar to yieldingly bear against the outer face of said barrel.

1l. In a syringe attachment, a collar presenting a cupshaped recess to receive the ilange of a syringe barrel, a washer to encircle a barrel and disposed adjacent said recess, a projecting part forming a part of said Washer to bear against the end zone of a syringe barrel and a tongue A References Cited in the tile of this patent UNITED STATES PATENTS 1,523,068 Hein Ian. 13, 1925 2,660,342 Ruf Nov. 24, 1953 2,744,648 Sehen' May 8, 1956 

